[PSUBS-MAILIST] pulled thread line - submarine AC and heat

Thu Apr 4 19:17:15 EDT 2019

Hugh,
was hoping you were out there.
Couldn't find your snorkel valve on your site, how do I find it thanks &
what price? ( alanlindsayjames at yahoo.com )
Where would I find the Kittredge design?
Yes I would have to come up with a solution for 500psi but that was a starter.
What do you think about my idea of using a 3 part ball valve & replacing the
ball. It could be an inexpensive option if I bought an appropriate replacement
hollow ball & pressure tested it. 
Of course there is a back up ball valve inside the hull that is also closed when
diving so a failure of the snorkel valve would result in a bit of water coming
In to the hull when I opened the hull stop valve on surfacing.
Thanks Alan

> On 5/04/2019, at 10:57 AM, Hugh Fulton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan, that is not rated for a depth.  Kittredge already has a design.  Mine is a variation of his but 2”. 
> There are no pressure ratings on the balls.  Hugh
>  
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan via Personal_Submersibles
> Sent: Thursday, 4 April 2019 8:42 PM
> To: Personal Submersibles General Discussion
> Subject: Re: [PSUBS-MAILIST] pulled thread line - submarine AC and heat
>  
> Ok, while you guys have been sleeping I have been googling for a 
> suitable snorkel valve, & come up with this Wagner item below.
> I searched under "inverted vent check valve". I am not sure of the price of
> the below item. 
> If anyone knows of a good option I would be interested.
> Maybe there is a suitable valve that can be hacked! Ie. Use the valve seat
> & buy a hollow stainless ball.
> Alan
> https://wagerusa.com/pages/marine/1700series.html
> <image001.png>
> 
> On 4/04/2019, at 6:03 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Am thinking about having 2 snorkel valves for cooling in transit. 
> One for air in & one for air out, with a descent blower circulating the air.
> Any thoughts on how effective it would be? 
> Hugh Fulton had a snorkel valve design on his Q-sub site but can't find it.
> Assume you would need a hollow ball that floats up & seals the inlet &
> an additional valve inside the hull for redundancy, with a blower on the designated
> Inlet.
> Alan
> 
> 
> 
> On 4/04/2019, at 5:42 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>  
> Hello Marc,
> haven't heard from you for a while.
> What calculation was off?
> Peltiers are 1/4 as efficient as conventional AC.
> Average car AC system uses 4hp which is 2,980W.
> 4 X 2980 = 11,920.
> Wish it was off as I have bought 20 so far & I am going to need a lot of
> batteries to keep up with a cars AC system.
> I am starting to talk myself out of relying on them solely & in to a good snorkel
> system that I could suck air through while transiting on the surface.
> Alan
>  
> On 4/04/2019, at 4:38 PM, Marc de Piolenc via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>  
> Pretty sure your calculations are off.
>  
> Did some work with Peltier effect coolers a few years back.
>  
> Search for information on this technology as applied in the military. There are many applications for which vapor-compression refrigeration is not possible or too dangerous.
>  
> Marc
>  
> On 03/04/2019 9:18 AM, Alan via Personal_Submersibles wrote:
>  
> I don't know how many peltiers. If you based your air conditioning system
> on a car which uses 4 hp or 2,980 Watts & factored in that peltiers are 1/4
> as efficient as conventional air conditioning then you would need 11,920 W
> to get the equivalent cooling! And then it's an unknown as the peltiers are
> more efficient when there is a larger temperature differential between sides.
> On 3/04/2019, at 12:15 AM, Brian Hughes via Personal_Submersibles <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org>> wrote:
> Alan,
>  
> How many peltier chips do you think you'll use? Or need? I was kinda planning the same idea, but was trying Kydex. I made a cover with a thin sheet of clear plastic, but I wondered about durability. Hadn't thought fiberglass. Doh.  The real reason is I picked up for free a vacuum thermomolding machine and needed an excuse to play.
>  
> As per attachment I was thinking magnets, the chrome covered ones you can get a home depot. Attach where needed.  Spread heat transfer paste on the surface, etc. How will you attach yours? Building in piping for condensation runoff?
>  
> For heat I'm going with a cigarette lighter socket into which I can plug my heated vest I use on cold days on the Harley. Keep the core warm, etc.
>  
> Get Outlook for Android <https://aka.ms/ghei36>
>  
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